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प्रश्न
Give reasons for the following.
Sodium and potassium are stored in kerosene.
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उत्तर
Sodium and potassium are stored in kerosene because they are highly reactive elements. They can easily catch fire even when in contact with air.
संबंधित प्रश्न
State one use of the following metal:
Copper
State one use of the following metal:
Gold
Name an alloy of lead and tin.
Name one ore of manganese. Which compound of manganese is present in this ore? Also write its chemical formula.
State two important uses of following metal:
Uses of gold
State two important uses of following metal.
Uses of copper
Write name.
The oxide that forms salt and water by reacting with both acid and base.
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
